Gulf Coast Gauges

Bayou Mallet at Highway 91 north of Iota water level

USGS gauge 08010120 · Acadia Parish · Lafayette and Acadiana · NWS gauge BMIL1

2.32 ft

gage height, Oct 23, 2026 at 3:00 PM CDT · 2 hours ago

Below NWS minor flood stage
9.7 ft
NWS action stage
11.0 ft
NWS minor flood stage
12.0 ft
NWS moderate flood stage
17.0 ft
NWS major flood stage
21.0 ft
Highest since 2022 (USGS)
16.39 ft (May 10, 2025)
Usual range
1.84 to 3.34 ft

USGS marks recent readings as provisional: they can be revised after review.

No National Weather Service alert covering Acadia Parish was active when this page was generated (Oct 23, 2026 at 5:05 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.

Last 7 days

1.7 2.5 3.3 Oct 17 Oct 18 Oct 19 Oct 20 Oct 21 Oct 22 Oct 23

Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.

How to read this gauge

Gage height is the height of the water surface above this gauge's own zero point, which sits at 4.22 ft NAVD88. It is not a water depth and not an elevation: add 4.22 ft to get the water surface elevation.

The flood stages are the National Weather Service's, on the same scale as the gage height; they are the NWS's references for this location, not estimates made here.

Daily highs and lows since September 11, 2026

1.7 3.0 4.3 2026-09-11 – 2026-10-23 · bars are daily low to high

Annual peaks since 2022

In 5 complete water years of comparable USGS records (since 2022), the highest peak was 16.39 ft on May 10, 2025. So far in water year 2027 (since October 1) the highest reading is 2.96 ft on October 8, 2026.

2 7 12 17 22 2025 major 21 ft moderate 17 ft minor 12 ft action 11 ft Water year 2022: 13.04 ft on August 31, 2022 Water year 2023: 15.00 ft on December 15, 2022 Water year 2024: 15.81 ft on January 28, 2024 Water year 2025: 16.39 ft on May 10, 2025 Water year 2026: 14.93 ft on May 12, 2026 Water year 2027 so far: 2.96 ft on October 8, 2026 2025 2024 2023

Each dot is the highest gage height of a water year (October to September), from the USGS annual peak record, with recent years USGS has not published yet taken from its 15-minute readings and this site's own; hover a dot for its date. Dashed lines are NWS flood stages.

Download the readings

bayou-mallet-at-highway-91-north-of-iota.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,049 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.

Source. Gage height from the U.S. Geological Survey; flood stages and historic crests from the NWS National Water Prediction Service. This site is not affiliated with either agency.